Lock



FIG. 1 is a perspective view of a first embodiment of a lock according to our new design;

FIG. 2 is a bottom view of the lock of FIG. 1;

FIG. 3 is a top view of lock of FIG. 1;

FIG. 4 is a side view of the lock of FIG. 1;

FIG. 5 is an opposite side view of the lock of FIG. 1;

FIG. 6 is a front view of the lock of FIG. 1;

FIG. 7 is a rear view of the lock of FIG. 1;

FIG. 8 is a perspective view of a second embodiment of a lock according to our new design;

FIG. 9 is a bottom view of the lock of FIG. 8;

FIG. 10 is a top view of lock of FIG. 8;

FIG. 11 is a side view of the lock of FIG. 8;

FIG. 12 is an opposite side view of the lock of FIG. 8;

FIG. 13 is a front view of the lock of FIG. 8; and,

FIG. 14 is a rear view of the lock of FIG. 8.

Any elements shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a lock, as shown and described. 